openstack/net-virt-providers/src/main/java/org/opendaylight/ovsdb/openstack/netvirt/providers/openflow13/PipelineOrchestratorImpl.java

   1 /*
   2  * Copyright (C) 2014 Red Hat, Inc.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  *
   8  * Authors : Dave Tucker, Madhu Venugopal
   9  */
  10
  11 package org.opendaylight.ovsdb.openstack.netvirt.providers.openflow13;
  12
  13 import com.google.common.collect.Lists;
  14 import com.google.common.collect.Maps;
  15 import java.util.List;
  16 import java.util.Map;
  17 import java.util.concurrent.BlockingQueue;
  18 import java.util.concurrent.ExecutorService;
  19 import java.util.concurrent.Executors;
  20 import java.util.concurrent.LinkedBlockingQueue;
  21 import org.opendaylight.ovsdb.openstack.netvirt.MdsalUtils;
  22 import org.opendaylight.ovsdb.openstack.netvirt.api.Action;
  23 import org.opendaylight.ovsdb.openstack.netvirt.api.NodeCacheListener;
  24 import org.opendaylight.ovsdb.openstack.netvirt.api.NodeCacheManager;
  25 import org.opendaylight.ovsdb.openstack.netvirt.providers.ConfigInterface;
  26 import org.opendaylight.ovsdb.utils.servicehelper.ServiceHelper;
  27 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.Node;
  28 import org.osgi.framework.BundleContext;
  29 import org.osgi.framework.ServiceReference;
  30 import org.slf4j.Logger;
  31 import org.slf4j.LoggerFactory;
  32
  33 public class PipelineOrchestratorImpl implements ConfigInterface, NodeCacheListener, PipelineOrchestrator {
  34     private static final Logger logger = LoggerFactory.getLogger(PipelineOrchestratorImpl.class);
  35     private List<Service> staticPipeline = Lists.newArrayList(
  36             Service.CLASSIFIER,
  37             Service.ARP_RESPONDER,
  38             Service.INBOUND_NAT,
  39             Service.EGRESS_ACL,
  40             Service.LOAD_BALANCER,
  41             Service.ROUTING,
  42             Service.L3_FORWARDING,
  43             Service.L2_REWRITE,
  44             Service.INGRESS_ACL,
  45             Service.OUTBOUND_NAT,
  46             Service.L2_FORWARDING
  47     );
  48     Map<Service, AbstractServiceInstance> serviceRegistry = Maps.newConcurrentMap();
  49     private volatile BlockingQueue<Node> queue;
  50     private ExecutorService eventHandler;
  51
  52     public PipelineOrchestratorImpl() {
  53         eventHandler = Executors.newSingleThreadExecutor();
  54         this.queue = new LinkedBlockingQueue<Node>();
  55         logger.info("PipelineOrchestratorImpl constructor");
  56         start();
  57     }
  58
  59     public void registerService(final ServiceReference ref, AbstractServiceInstance serviceInstance){
  60         Service service = (Service)ref.getProperty(AbstractServiceInstance.SERVICE_PROPERTY);
  61         logger.info("registerService {} - {}", serviceInstance, service);
  62         serviceRegistry.put(service, serviceInstance);
  63     }
  64
  65     public void unregisterService(final ServiceReference ref) {
  66         serviceRegistry.remove(ref.getProperty(AbstractServiceInstance.SERVICE_PROPERTY));
  67     }
  68     @Override
  69     public Service getNextServiceInPipeline(Service service) {
  70         int index = staticPipeline.indexOf(service);
  71         if (index >= staticPipeline.size() - 1) return null;
  72         return staticPipeline.get(index + 1);
  73     }
  74
  75     @Override
  76     public AbstractServiceInstance getServiceInstance(Service service) {
  77         if (service == null) return null;
  78         return serviceRegistry.get(service);
  79     }
  80
  81     public void start() {
  82         eventHandler.submit(new Runnable()  {
  83             @Override
  84             public void run() {
  85                 try {
  86                     while (true) {
  87                         Node node = queue.take();
  88                         /*
  89                          * Since we are hooking on OpendaylightInventoryListener and as observed in
  90                          * Bug 1997 multiple Threads trying to write to a same table at the same time
  91                          * causes programming issues. Hence delaying the programming by a second to
  92                          * avoid the clash. This hack/workaround should be removed once Bug 1997 is resolved.
  93                          */
  94                         logger.info(">>>>> dequeue: {}", node);
  95                         Thread.sleep(1000);
  96                         for (Service service : staticPipeline) {
  97                             AbstractServiceInstance serviceInstance = getServiceInstance(service);
  98                             //logger.info("pipeline: {} - {}", service, serviceInstance);
  99                             if (serviceInstance != null) {
 100                                 if (MdsalUtils.getBridge(node) != null) {
 101                                     serviceInstance.programDefaultPipelineRule(node);
 102                                 }
 103                             }
 104                         }
 105                     }
 106                 } catch (Exception e) {
 107                     logger.warn("Processing interrupted, terminating ", e);
 108                 }
 109
 110                 while (!queue.isEmpty()) {
 111                     queue.poll();
 112                 }
 113                 queue = null;
 114             }
 115         });
 116     }
 117
 118     public void stop() {
 119         queue.clear();
 120         eventHandler.shutdownNow();
 121     }
 122
 123     @Override
 124     public void enqueue(Node node) {
 125         logger.info(">>>>> enqueue: {}", node);
 126         try {
 127             queue.put(node);
 128         } catch (InterruptedException e) {
 129             logger.warn("Failed to enqueue operation {}", node, e);
 130         }
 131     }
 132
 133     @Override
 134     public void notifyNode(Node node, Action action) {
 135         if (action == Action.ADD) {
 136             enqueue(node);
 137         } else {
 138             logger.info("update ignored: {}", node);
 139         }
 140     }
 141
 142     @Override
 143     public void setDependencies(BundleContext bundleContext, ServiceReference serviceReference) {
 144         NodeCacheManager nodeCacheManager =
 145                 (NodeCacheManager) ServiceHelper.getGlobalInstance(NodeCacheManager.class, this);
 146         nodeCacheManager.cacheListenerAdded(
 147                 bundleContext.getServiceReference(PipelineOrchestrator.class.getName()), this);
 148     }
 149
 150     @Override
 151     public void setDependencies(Object impl) {
 152
 153     }
 154 }